Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Agent Workspace Linux

An isolated, hidden Linux desktop that an AI agent fully controls — over MCP — without ever touching your real mouse, keyboard, focus, or browser.

Compatibility: Not stated.

Grade B

Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.

Graded by PlugVetRubric v2

Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.

Rescanned at commit c3ba9482e138.

PERMISSION_DELETE_FILES NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV OBFUSCATION_FILE_OVER_READ_CAP

Why this grade

  • PERMISSION_DELETE_FILES Low

    Contains a call that can delete files.

    npm/scripts/postinstall.js, line 77 fs.rmSync(stagingDir, { recursive: true, force: true });

  • NETWORK_NO_FIXED_HOST Low

    Makes a network call whose host is not written as a fixed address.

    npm/scripts/postinstall.js, line 178 const req = https.get(

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    src/profile.rs, line 1700 .env

  • OBFUSCATION_FILE_OVER_READ_CAP Note

    A file was over the read cap and was not fully read.

    src/server.rs, line 1 use crate::agent::{AgentModeSummary, AgentTargetHandles};

Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.

Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.

What was checked

Plain notes from the hygiene checks.

  • Permissions

    Concern

    can delete files.

    PERMISSION_DELETE_FILES

    npm/scripts/postinstall.js, line 77

    fs.rmSync(stagingDir, { recursive: true, force: true });

    npm/scripts/postinstall.js, line 112

    fs.rmSync(full, { recursive: true, force: true });

    npm/scripts/postinstall.js, line 152

    const removePartial = () => fs.unlink(tmpFile, () => reject(err));

    Show more

    npm/scripts/postinstall.test.js, line 51

    fs.rmSync(dir, { recursive: true, force: true });

    npm/scripts/postinstall.test.js, line 70

    fs.rmSync(dir, { recursive: true, force: true });

    scripts/mcp_clean_permissions_smoke.js, line 727

    fs.rmSync(tempDir, { recursive: true, force: true });

    scripts/mcp_no_host_display_viewer_smoke.js, line 280

    fs.rmSync(tempDir, { recursive: true, force: true });

    scripts/mcp_non_headless_viewer_smoke.js, line 481

    fs.rmSync(tempDir, { recursive: true, force: true });

  • Install and update

    Pass

    No install-time script found, and dependencies are pinned or absent.

  • Network

    Concern

    can reach a host that is not written as a fixed address.

    NETWORK_NO_FIXED_HOST

    npm/scripts/postinstall.js, line 178

    const req = https.get(

    npm/scripts/postinstall.js, line 244

    req.once("close", () => requests.delete(req));

    scripts/integration_smoke.sh, line 328

    c = socket.create_connection(("127.0.0.1", port), timeout=2)

    Show more

    scripts/integration_smoke.sh, line 335

    socket.create_connection(("1.1.1.1", 80), timeout=2)

    scripts/integration_smoke.sh, line 372

    socket.create_connection(("1.1.1.1", 80), timeout=2)

    scripts/integration_smoke.sh, line 509

    print(urllib.request.urlopen(url, timeout=2).readline().decode().strip())

    scripts/lib/chrome_cdp.js, line 19

    const request = http.request(

    scripts/lib/chrome_cdp.js, line 156

    const socket = net.connect({ host: parsed.hostname, port });

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_DOTENV

    src/profile.rs, line 1700

    .env

    .gitignore, line 10

    .env

    src/viewer.rs, line 3579

    .env(VIEWER_BACKEND_ENV, VIEWER_BACKEND_X11)

    Show more

    src/viewer.rs, line 3580

    .env(VIEWER_PERMISSIONS_ENV, permissions_json)

    src/viewer.rs, line 4279

    .env(VIEWER_PERMISSIONS_ENV, permissions_json)

    src/workspace.rs, line 9251

    .env("DISPLAY", &status.display)

  • Agent instructions

    Pass

    No instruction to ignore earlier instructions or to hide a step.

  • Obfuscation

    Note

    a file was over the read cap and was not fully read.

    OBFUSCATION_FILE_OVER_READ_CAP

    src/server.rs, line 1

    use crate::agent::{AgentModeSummary, AgentTargetHandles};

    src/viewer.rs, line 1

    use crate::{

    src/workspace.rs, line 1

    use crate::approval::{

  • Licence

    Pass

    A licence file is present (LICENSE).

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

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Note

Hygiene check of commit c3ba9482e138. can delete files. can reach a host that is not written as a fixed address. reads a credential or environment file. a file was over the read cap and was not fully read.

Date and source

Date checked:

View source

github.com

Commit graded: c3ba9482e138825c8faffc970aa06aa7dcf8a172

This link goes to the original host. PlugVet does not host or check what you download from there, and installing it is your own decision and risk.

Read how this letter is chosen